10 is the answer to your question
Step-by-step explanation:
Case 1 :


Case 2 :


Hey there!
B in a slope intercept form equation is the the y intercept. It dictates where the line will cross the y axis, and therefore the line's placement altogether. This is because if there was no y intercept, the line would only be shaped by the slope, and would start at 0.
Hope this helped!
Answer:
Your answer is 16 feet.
Step-by-step explanation:
P=2(l+w)=2·(2+6)=16